From 4bd7547756af5c71d55e4d77f41db3d06c18b3e0 Mon Sep 17 00:00:00 2001 From: Chao Xie Date: Tue, 28 Jan 2014 15:20:44 +0800 Subject: pinctrl: single: add low power mode support For some silicons, the pin configuration register can control the output of the pin when the pad including the pin enter low power mode. For example, the pin can be "Drive 1", "Drive 0", "Float" when the pad including the pin enter low power mode. It is very useful when you want to control the power leakeage when the SOC enter low power mode, and can save more power for the low power mode. Signed-off-by: Chao Xie Signed-off-by: Linus Walleij --- drivers/pinctrl/pinctrl-single.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/pinctrl/pinctrl-single.c') diff --git a/drivers/pinctrl/pinctrl-single.c b/drivers/pinctrl/pinctrl-single.c index de6459628b4f..81075f2a1d3f 100644 --- a/drivers/pinctrl/pinctrl-single.c +++ b/drivers/pinctrl/pinctrl-single.c @@ -662,6 +662,7 @@ static int pcs_pinconf_get(struct pinctrl_dev *pctldev, break; case PIN_CONFIG_DRIVE_STRENGTH: case PIN_CONFIG_SLEW_RATE: + case PIN_CONFIG_LOW_POWER_MODE: default: *config = data; break; @@ -699,6 +700,7 @@ static int pcs_pinconf_set(struct pinctrl_dev *pctldev, case PIN_CONFIG_INPUT_SCHMITT: case PIN_CONFIG_DRIVE_STRENGTH: case PIN_CONFIG_SLEW_RATE: + case PIN_CONFIG_LOW_POWER_MODE: shift = ffs(func->conf[i].mask) - 1; data &= ~func->conf[i].mask; data |= (arg << shift) & func->conf[i].mask; @@ -1101,6 +1103,7 @@ static int pcs_parse_pinconf(struct pcs_device *pcs, struct device_node *np, { "pinctrl-single,drive-strength", PIN_CONFIG_DRIVE_STRENGTH, }, { "pinctrl-single,slew-rate", PIN_CONFIG_SLEW_RATE, }, { "pinctrl-single,input-schmitt", PIN_CONFIG_INPUT_SCHMITT, }, + { "pinctrl-single,low-power-mode", PIN_CONFIG_LOW_POWER_MODE, }, }; struct pcs_conf_type prop4[] = { { "pinctrl-single,bias-pullup", PIN_CONFIG_BIAS_PULL_UP, }, -- cgit v1.2.3